WO2022095192A1

WO2022095192A1 - Dual-motor alternating current/direct current brushless electric hammer

Info

Publication number: WO2022095192A1
Application number: PCT/CN2020/134167
Authority: WO
Inventors: 周海春
Original assignee: 江苏铁锚工具有限公司
Priority date: 2020-11-05
Filing date: 2020-12-07
Publication date: 2022-05-12

Abstract

A dual-motor alternating current/direct current (AC/DC) brushless electric hammer, comprising a housing (10) and a mechanical head. A first motor (30) comprises a rotor (31), a first motor shaft and a first gear (32); the rotor (31) is sleeved on an outer side of the first motor shaft, and the first gear (32) is sleeved on an outer side of the first motor shaft; an upper end of the first motor shaft is fixedly connected to an eccentric wheel (50), and the eccentric wheel (50) is hinged to a connecting rod; the other end of the connecting rod is connected to a piston, and the piston is connected to a hammer block (60); a cylinder is provided on the left side of the hammer block (60), an impactor is provided in the interior of the cylinder, and the impactor is fittedly connected to a sliding sleeve (20). A second motor (40) comprises a stator (41), a second motor shaft and a second gear (42), the stator (41) is sleeved on an outer side of the second motor shaft, and the second gear is sleeved on an outer side of the second motor shaft; and the first gear (32) meshes with the second gear (42), and the second gear (42) meshes with a main gear (70). The electric hammer has four functions in one twist, and picking, drilling, hammer-drilling and angle-setting are all electrically adjusted, so that there is less efficiency loss; in addition, in the technical solution, the rotational speed of a motor may be adjusted when the electric hammer hits different drill bits.

Description

Dual motor AC and DC brushless hammer

technical field

The invention relates to the technical field of electric hammers, in particular to a dual-motor AC-DC brushless electric hammer.

Background technique

The electric hammer is an electric rotary hammer drill with a pneumatic hammer mechanism. The electric hammer uses the principle of piston movement, and the compressed gas impacts the drill bit without much effort by hand, and can open 6-100mm holes in hard materials such as concrete, bricks, and stones. In the prior art, the electric hammer adopts multi-gear shifting clutch to realize the pick, turn, hammer drill, and fix the angle of the electric hammer. The disadvantage of this transmission is that the shifting consumes the efficiency of the motor, and the constant speed of the machine has certain limitations for different drill bits. sex.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a dual-motor AC-DC brushless electric hammer to solve one or more of the above-mentioned problems in the prior art.

The present invention provides a dual-motor AC and DC brushless electric hammer, which includes a casing and a mechanical head, the mechanical head is arranged at the front end of the casing, the mechanical head includes a sliding sleeve and a main gear, and the main gear is tightly connected to the The outer periphery of the sliding sleeve and the casing are provided with a first motor, a second motor, an eccentric, a connecting rod, a piston and a hammer block. The first motor includes a rotor, a first motor shaft and a first gear, so The rotor is sleeved on the outside of the first motor shaft and the rotor is fixedly connected with the first motor shaft, the first gear is sleeved on the outside of the first motor shaft, and the first gear is connected to the first motor shaft. The first motor shaft is fixedly connected, the upper end of the first motor shaft is fixedly connected with the eccentric, the eccentric is hinged with the connecting rod, and the other end of the connecting rod is connected with the piston , the piston is connected with the hammer block, the left side of the hammer block is provided with a cylinder, the cylinder is fixedly arranged on the inner upper side of the casing, the inside of the cylinder is provided with an impactor, the The impactor is tightly connected with the sliding sleeve, the second motor includes a stator, a second motor shaft and a second gear, the stator is sleeved on the outside of the first motor shaft, and the stator is connected to the first motor shaft. A motor shaft is fixedly connected, the second gear is sleeved on the outside of the second motor shaft, the second gear is fixedly connected to the second motor shaft, and the first gear is meshed with the second gear , the second gear meshes with the main gear.

In some embodiments, a case handle and a battery pack are further included, the case handle is located on the right side of the case, and the battery pack is detachably connected to the case handle.

In some embodiments, the first motor shaft is further sleeved with a first fan blade, the first fan blade is located above the rotor, the second motor shaft is further sleeved with a second fan blade, and the second fan blade is sleeved. The fan blades are located above the stator.

In some embodiments, the first motor and the second motor are arranged in parallel, the first gear and the second gear are in parallel shaft engagement, and the second gear is in mesh with the main gear intersecting shaft.

In some embodiments, a handle bracket is further included, the handle bracket is fixed under the casing, and the handle bracket is arranged in parallel with the first motor.

In some embodiments, the first motor and the second motor are arranged vertically, the first gear and the second gear are in mesh with an intersecting axis, and the second gear is in mesh with the main gear parallel to the axis.

Beneficial effects:

The electric hammer of the present invention has four functions in one twist. The pick, drill, hammer drill and fixed angle are all electronically adjusted, so that the efficiency loss is less, and the motor speed of the present invention can be adjusted.

Description of drawings

1 is a schematic structural diagram of a dual-motor AC-DC brushless hammer according to an embodiment of the present invention;

2 is a schematic structural diagram of a dual-motor AC-DC brushless hammer according to an embodiment of the present invention;

3 is a schematic structural diagram of a dual-motor AC-DC brushless hammer according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a dual-motor AC-DC brushless hammer according to an embodiment of the present invention.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only The embodiments are part of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present application.

It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances for the embodiments of the application described herein. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

The terms "installed", "set up", "provided with", "connected", "connected", "socketed" should be construed broadly. For example, it may be a fixed connection, a detachable connection, or a unitary structure; it may be a mechanical connection, or an electrical connection; it may be directly connected, or indirectly connected through an intermediary, or between two devices, elements, or components. internal communication. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

As shown in Figures 1 and 2:

A dual-motor AC/DC brushless hammer includes a casing 10, a mechanical head, a casing handle 81 and a battery pack 82. The mechanical head is located at the front end 10 of the casing, and the mechanical head includes a sliding sleeve 20 and a main Gear 70, the main gear is tightly connected to the outer periphery of the sliding sleeve 20, the casing handle 81 is located on the right side of the casing 10, the battery pack 82 and the casing handle 81 are detachable connection, the casing 10 is provided with a first motor 30, a second motor 40, an eccentric 50, a connecting rod, a piston and a hammer block 60, and the first motor 30 includes a rotor 31, a first motor shaft and a first motor shaft. A gear 32, the rotor 31 is sleeved on the outer side of the first motor shaft and the rotor 31 is fixedly connected with the first motor shaft, the first gear 32 is sleeved on the outer side of the first motor shaft The outer side and the first gear 32 is fixedly connected with the first motor shaft, the upper end of the first motor shaft is fixedly connected with the eccentric wheel 50, the eccentric wheel 50 is hinged with the connecting rod, the The other end of the connecting rod is connected with the piston, the piston is connected with the hammer block 60 , and a cylinder is provided on the left of the hammer block 60 , and the cylinder is fixed on the inside of the casing 10 . The inside of the cylinder is provided with an impactor, the impactor is tightly connected with the sliding sleeve 20, the first motor shaft is also sleeved with a first fan blade 33, and the first fan blade 33 is located in the Above the rotor 31 , the second motor 40 includes a stator 41 , a second motor shaft and a second gear 42 , the stator 41 is sleeved on the outside of the first motor shaft, and the stator 41 is connected to the first motor The shaft is fixedly connected, the second gear sleeve 42 is arranged on the outside of the second motor shaft, the second gear 42 is fixedly connected to the second motor shaft, the first gear 32 is connected to the second gear 42 meshes, the second gear 42 meshes with the main gear 70 , the second motor shaft is also sleeved with a second fan blade 43 , and the second fan blade 43 is located above the stator 41 .

Wherein, it also includes a handle bracket 81, the first motor 30 and the second motor 40 are arranged in parallel, the first gear 32 and the second gear 42 are engaged in parallel shafts, and the second gear 42 and the The main gear 70 is engaged with the intersecting axis, the handle bracket 90 is fixed under the casing 10 , and the handle bracket 90 is arranged in parallel with the first motor 30 .

As shown in Figures 3 and 4:

The dual-motor AC/DC brushless hammer includes a casing 10, a mechanical head, a casing handle 81 and a battery pack 82, the mechanical head is arranged at the front end of the casing 10, and the mechanical head includes a sliding sleeve 20 and a main Gear 70, the main gear 70 is tightly connected to the outer periphery of the sliding sleeve 20, the casing handle 81 is located on the right side of the casing 10, the battery pack 82 and the casing handle 81 are detachable The casing 10 is provided with a first motor 30, a second motor 40, an eccentric 50, a connecting rod, a piston and a hammer block, and the first motor 30 includes a rotor 31, a first motor shaft and a first Gear, the rotor 31 is sleeved on the outside of the first motor shaft and the rotor 31 is fixedly connected with the first motor shaft, the first gear is sleeved on the outside of the first motor shaft and is The first gear is fixedly connected with the first motor shaft, the upper end of the first motor shaft is fixedly connected with the eccentric wheel 50, the eccentric wheel 50 is hinged with the connecting rod, and the other side of the connecting rod is connected. One end is connected with the piston, the piston is connected with the hammer block 60, a cylinder is provided on the left of the hammer block 60, and the cylinder is fixed on the inner upper side of the casing 10, the The inside of the cylinder is provided with an impactor, the impactor is tightly connected with the sliding sleeve 20, the first motor shaft is also sleeved with a first fan blade 33, and the first fan blade 33 is located above the rotor 31, The second motor 40 includes a stator 41, a second motor shaft and a second gear. The stator 41 is sleeved on the outside of the first motor shaft and the stator 41 is fixedly connected to the first motor shaft, so The second gear is sleeved on the outside of the second motor shaft, the second gear is fixedly connected with the second motor shaft, the first gear is meshed with the second gear, and the second gear is connected to the second motor shaft. The main gear 70 is meshed, and the second motor shaft is also sleeved with a second fan blade 43 , and the second fan blade 43 is located to the left of the stator 41 .

Wherein, the first motor 30 and the second motor 40 are arranged vertically, the first gear and the second gear mesh with the intersecting axis, and the second gear meshes with the main gear 70 parallel to the axis.

When in use, the DC switch is activated, the power of the battery pack is introduced into the driver, and the first motor is controlled to start to operate, which drives the first motor shaft to rotate, and drives the eccentric wheel to rotate together, thereby driving the piston and its inner hammer to move linearly in the sliding sleeve. The hammer hits the impactor, and the impactor impacts the working bit; at the same time, the first motor shaft drives the first gear to rotate, the first gear drives the second gear to rotate, the second gear drives the main gear to rotate, and then drives the sliding sleeve Rotate, and then drive the working drill to rotate; the working drill rotates and impacts at the same time to achieve the drilling effect.

When the first motor and the second motor operate, the first blade and the second blade rotate with the first motor shaft and the second motor shaft, respectively, and provide cooling air passages for the first motor and the second motor, respectively.

The above descriptions are only the preferred modes of the present invention. It should be pointed out that for those of ordinary skill in the art, some modifications and improvements can be made without departing from the inventive concept of the present invention, and these should also be regarded as the present invention. within the scope of protection.

Claims

A dual-motor AC-DC brushless electric hammer is characterized in that it includes a casing and a mechanical head, the mechanical head is arranged at the front end of the casing, the mechanical head includes a sliding sleeve and a main gear, and the main gear is tightly connected On the outer periphery of the sliding sleeve, the casing is provided with a first motor, a second motor, an eccentric wheel, a connecting rod, a piston and a hammer block, and the first motor includes a rotor, a first motor shaft and a first gear, The rotor is sleeved on the outer side of the first motor shaft and the rotor is fixedly connected with the first motor shaft, the first gear is sleeved on the outer side of the first motor shaft and the first gear It is fixedly connected with the first motor shaft, the upper end of the first motor shaft is fixedly connected with the eccentric wheel, the eccentric wheel is hinged with the connecting rod, and the other end of the connecting rod is connected with the piston. The piston is connected with the hammer block, the left side of the hammer block is provided with a cylinder, the cylinder is fixedly arranged on the inner upper side of the casing, and the inside of the cylinder is provided with an impactor, so The impactor is tightly connected with the sliding sleeve, the second motor includes a stator, a second motor shaft and a second gear, the stator is sleeved on the outside of the first motor shaft, and the stator and the The first motor shaft is fixedly connected, the second gear is sleeved on the outside of the second motor shaft, the second gear is fixedly connected with the second motor shaft, and the first gear and the second gear are In mesh, the second gear meshes with the main gear.
The dual-motor AC-DC brushless hammer according to claim 1, further comprising a case handle and a battery pack, the case handle is located on the right side of the case, and the battery pack is connected to the battery pack. The case handle is detachably connected.
The dual-motor AC-DC brushless hammer according to claim 1, wherein the first motor shaft is further sleeved with a first fan blade, the first fan blade is located above the rotor, and the first fan blade is located above the rotor. The two motor shafts are also sleeved with a second fan blade, and the second fan blade is located above the stator.
The dual-motor AC-DC brushless hammer according to any one of claims 1 to 3, wherein the first motor and the second motor are arranged in parallel, the first gear and the first Two gears are meshed with parallel shafts, and the second gears are meshed with the intersecting shafts of the main gear.
The dual-motor AC-DC brushless electric hammer according to claim 4, further comprising a handle bracket, the handle bracket is fixed under the casing, and the handle bracket is connected to the The first motors are arranged in parallel.
The dual-motor AC-DC brushless hammer according to any one of claims 1 to 3, wherein the first motor and the second motor are arranged vertically, and the first gear and the first gear are arranged vertically. The two gears are meshed with the intersecting shaft, and the second gear is meshed with the main gear parallel to the shaft.